Homework Answers
Option IV. HCl addition of an alkene goes through a carbocation intermediate- is the correct option.
The mechanism is shown below-
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Question 4 (1 point) Which of the following statements is true? HCI addition of an alkene...
i'm not sure which is the answer but i do know that option 2 is incorrect...
i'm not sure which is the answer but i do know that option 2
is incorrect
Previous Page Next Page Page 30 Question 3 (1 point) Saved Which of the following statements is true? O An Sg2 mechanism goes through a trigonal bipyramidal intermediate O An Sn2 mechanism goes through a carbocation transition state O An Sn2 mechanism goes through a trigonal bipyramidal transition state An Sn2 mechanism goes through a tetrahedral intermediate Previous Page Next Page Page 3 of
Question 26 (1 point) Which of the following statements are true? (Check all that apply) O...
Question 26 (1 point) Which of the following statements are true? (Check all that apply) O A) Grignard reagent addition to a propanone generates a primary alcohol. O B) Acid (HX) addition to an alkene goes through the most highly substituted carbocation intermediate. UC) Sodium borohydride reduction of a butanone generates a secondary alcohol. U D) Tertiary alcohols can be oxidized to carboxylic acids with KMnO4.
Question 6 Free-radical addition of HBr/peroxides to an alkene goes through A) a carbocation intermediate that...
Question 6 Free-radical addition of HBr/peroxides to an alkene goes through A) a carbocation intermediate that is formed on the more substituted carbon B) a carbocation intermediate that is formed on the least substituted carbon C) a radical intermediate that is formed on the least substituted carbon. D) a radical intermediate that is formed on the most substituted carbon.
Question 6 Free-radical addition of HBr/peroxides to an alkene goes through A) a carbocation intermediate that is formed on the more...
(4) 6 points) Benzylic Carbocations. Reaction #1 shown below illustrates the acid catalyzed electrophilic addition of...
(4) 6 points) Benzylic Carbocations. Reaction #1 shown below illustrates the acid catalyzed electrophilic addition of H20 to an alkene. This reaction goes through a Benzylic Carbocation Intermediate: HO. Reaction #1 H2SO4 - -- (a) Which one of the following structures is the most reasonable benzylic carbocation intermediate for Reaction #1? ANSWER: answer: он (A) (b) Based on your answer to (a), how many total resonance structures are there for this benzylic carbocation? ANSWER:
Which of the following is true of the mechanism of BH3 addition to an alkene? Select...
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
please answer questions 1-4 Question 1 Which of the following is the most stable carbocation? СН3...
please answer questions 1-4
Question 1 Which of the following is the most stable carbocation? СН3 V. CH2 What is the major product of the following reaction? Н HBO C CHS CH CH CH3-CH ( CH, Br CH2-CH-C–CH, Br Br CH CH CH3-CH:-¢-CH Br ін, CHE CH CH.-CH- Br CH. D Question 3 What is the major product of the following reaction? CH, НО 1 Оснок IV. CH2OH CH3 "О" ОН Д. он СН3 CH3 Но Ш. CH, ОН Question...
Q 5.5: When the alkene below undergoes an ionic addition with HCI which of the following...
Q 5.5: When the alkene below undergoes an ionic addition with HCI which of the following is produced? A A single enantiomer. B A mixture of unknown R/S C An achiral chloride (D) Aracemic mixture.
Question 3 (1 point) Which is the correct alkene product from the E2 reaction below? Oc...
Question 3 (1 point) Which is the correct alkene product from the E2 reaction below? Oc Question 4 (1 point) The correct stereoelectronic arrangement of hydrogen and halide in an E2 reaction is antiperiplanar. True False Which of the alkyl halides below will undergo a carbocation rearrangement in a solvent like water or methanol? MO Mo-Br Me Me Me Me OB Oc All of the above
Question 4 Which is NOT true of a free energy diagram for an E1 reaction? o...
Question 4 Which is NOT true of a free energy diagram for an E1 reaction? o It proceed through a carbocation intermediate. O The first step is electrophilic elimination. O It includes two transition states. O It begins with a rate determining step.
QUESTION 2 1. Which one of the following statements is true? (HX is either HCl or HBr) Alkynes undergo electrop...
QUESTION 2 1. Which one of the following statements is true? (HX is either HCl or HBr) Alkynes undergo electrophilic substitution reactions with HX to give halogenated alkenes. Adding an excess of HX to an alkyne gftens times will stop the reaction at the alkene step instead of forming the halogenated alkane. When adding one mole of HX to an alkyne, regioselective Markovnikov addition is observed for the alkene product typically exhibiting trans stereochemistry When adding one mole of HX...
i'm not sure which is the answer but i do know that option 2
is incorrect
Previous Page Next Page Page 30 Question 3 (1 point) Saved Which of the following statements is true? O An Sg2 mechanism goes through a trigonal bipyramidal intermediate O An Sn2 mechanism goes through a carbocation transition state O An Sn2 mechanism goes through a trigonal bipyramidal transition state An Sn2 mechanism goes through a tetrahedral intermediate Previous Page Next Page Page 3 of
Question 26 (1 point) Which of the following statements are true? (Check all that apply) O A) Grignard reagent addition to a propanone generates a primary alcohol. O B) Acid (HX) addition to an alkene goes through the most highly substituted carbocation intermediate. UC) Sodium borohydride reduction of a butanone generates a secondary alcohol. U D) Tertiary alcohols can be oxidized to carboxylic acids with KMnO4.
Question 6 Free-radical addition of HBr/peroxides to an alkene goes through A) a carbocation intermediate that is formed on the more substituted carbon B) a carbocation intermediate that is formed on the least substituted carbon C) a radical intermediate that is formed on the least substituted carbon. D) a radical intermediate that is formed on the most substituted carbon.
Question 6 Free-radical addition of HBr/peroxides to an alkene goes through A) a carbocation intermediate that is formed on the more...
(4) 6 points) Benzylic Carbocations. Reaction #1 shown below illustrates the acid catalyzed electrophilic addition of H20 to an alkene. This reaction goes through a Benzylic Carbocation Intermediate: HO. Reaction #1 H2SO4 - -- (a) Which one of the following structures is the most reasonable benzylic carbocation intermediate for Reaction #1? ANSWER: answer: он (A) (b) Based on your answer to (a), how many total resonance structures are there for this benzylic carbocation? ANSWER:
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
please answer questions 1-4
Question 1 Which of the following is the most stable carbocation? СН3 V. CH2 What is the major product of the following reaction? Н HBO C CHS CH CH CH3-CH ( CH, Br CH2-CH-C–CH, Br Br CH CH CH3-CH:-¢-CH Br ін, CHE CH CH.-CH- Br CH. D Question 3 What is the major product of the following reaction? CH, НО 1 Оснок IV. CH2OH CH3 "О" ОН Д. он СН3 CH3 Но Ш. CH, ОН Question...
Q 5.5: When the alkene below undergoes an ionic addition with HCI which of the following is produced? A A single enantiomer. B A mixture of unknown R/S C An achiral chloride (D) Aracemic mixture.
Question 3 (1 point) Which is the correct alkene product from the E2 reaction below? Oc Question 4 (1 point) The correct stereoelectronic arrangement of hydrogen and halide in an E2 reaction is antiperiplanar. True False Which of the alkyl halides below will undergo a carbocation rearrangement in a solvent like water or methanol? MO Mo-Br Me Me Me Me OB Oc All of the above
Question 4 Which is NOT true of a free energy diagram for an E1 reaction? o It proceed through a carbocation intermediate. O The first step is electrophilic elimination. O It includes two transition states. O It begins with a rate determining step.
QUESTION 2 1. Which one of the following statements is true? (HX is either HCl or HBr) Alkynes undergo electrophilic substitution reactions with HX to give halogenated alkenes. Adding an excess of HX to an alkyne gftens times will stop the reaction at the alkene step instead of forming the halogenated alkane. When adding one mole of HX to an alkyne, regioselective Markovnikov addition is observed for the alkene product typically exhibiting trans stereochemistry When adding one mole of HX...
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